Permeable laneways and patios
Water-permeable landscaping surfaces
...sizes (bigger on the bottom, smaller on the top), leveled with a plate compactor.
Some installers add a layer of sand at the top (1 to 1.5 inches) to help set and level the stones, that is more common when the final surface will be sealed. With permeable surfaces that sand can wash through to the layers below. You ma...